Questions tagged [blockchain]
The journal of all confirmed Bitcoin transactions. The blockchain consists of a linked sequence of blocks and each block contains a list of transactions.—Please eponymous [blockchain.info] for the eponymous UK-based company.
2,838
questions
-1
votes
0
answers
26
views
Which Crypto exchange you use most to buy Bitcoin? [closed]
Which Crypto exchange you use most to buy Bitcoin? With or without KYC.
0
votes
0
answers
113
views
Is it real BTC or fake
All,
I received some BTC to my coinbase wallet after someone asked me to setup custom network using the below setting. I received the BTC but I couldn't transfer to any other wallet and the says ...
- 1
0
votes
0
answers
16
views
Blockchain confirmation [duplicate]
I'm not at all sufficient with this but what does it mean when they say I need one blockchain confirmation? I'm new to this and need it in laymans terms.
- 1
1
vote
1
answer
81
views
missing BTC - on chain but not in my personnel wallet
Missing Bitcoins BTC
On the 25th Oct 2023 I bought some BTC from the company I always use Bitttylicious the wallet I sent it to was
1kgXpdiYKZq5bLEVUhABiHbu4nLsg7bCT
I spoke to bittylicious and did ...
- 11
-1
votes
0
answers
17
views
Withdrawing from a closed out account [duplicate]
I recently received 2 letters from block chain with regards to old bitcoin opportunities I had signed in for they want my to take the money out apparently they are help due to my inactivity
I will try ...
1
vote
1
answer
294
views
Why does everyone talk about the blockchain being a record of transactions if it’s just a hash?
I’m trying to get to know how cryptocurrency works and everyone treats the blockchain like an active record of every transaction, like if someone wanted to reuse the same bitcoin with the same code ...
- 51
7
votes
3
answers
1k
views
Why is there a block size limit and why not increasing it?
Storage costs are now ridiculously smaller than they were when the limit was introduced more than 10 years ago. I am concerned keeping this arbitrary limit set by Satoshi could be holding us back.
Why ...
- 179
0
votes
0
answers
55
views
Can layer 2 or higher on Bitcoin handle billions of transactions and records to enable a form of decentralised democracy? [duplicate]
Essentially I'm asking if layer 2 or higher can handle billions of transactions and records as I'd like to develop / encourage the development of an app that can essentally hold all voter records (for ...
0
votes
0
answers
49
views
Sent Bitcoin not received [duplicate]
I sent my boyfriend Bitcoin, he has not received it yet. Is there something that I did wrong? it shows that the transaction started, but there's no green light to state that he's received it.
2
votes
3
answers
743
views
Why is the blockchain important?
The title says it all. What’s it important for? Is it just important for documenting all transactions and so it’s basically just a database? I know how blocks are made, please remain relevant.
- 51
0
votes
0
answers
23
views
NodeJS code to deobfuscate chainstate data
I am currently working on a Blockchain trading platform for a company and I want to have all the unspent output saved to a local database by reading the contents of chainstate folder but I couldn't ...
- 11
0
votes
0
answers
49
views
single mnemonic to create private key with different networks
I have both 12 and 24 words, but i can't remember which coin it has.
so shall i try all wallets to find out which has a coin or is there anything i can do practical?
with a 24 words can i create a ...
- 1
1
vote
1
answer
72
views
Why do I need to download the entire blockchain for a wallet when I can make one one with open source java like bitaddress.org
Like title said. And when i will have to use the btc I can login the wallet with the private key on a hot wallet.
- 23
0
votes
1
answer
47
views
Unconfirmed bitcoins deposit from online casion. they paid a fee of 1.82 on a 4k withdrawal.. what do I do? [duplicate]
I made a bitcoin withdrawal from a online casino of $4000. They sent me the payment but it won't confirm. I see they payed a fee of $1.82 so I'm sure thats why it hasnt confirmed yet but Its been a ...
0
votes
0
answers
20
views
2 bitcoin transactions are stuck on mempool, one is CPFP
I use BlueWallet and I have two pending bitcoin transaction
One outgoing
One incoming
The outgoing transaction is a CPFP
Both the ancestors and descendants transaction are stuck for hours now
How can ...
- 1
1
vote
1
answer
167
views
Blockchain pruned node still downloading old blocks
We are working on a Bitcoin project for which we need to have the bitcoin node. The point is that we do not need to have the entire bitcoin node downloaded but only from the moment we start the ...
- 113
1
vote
1
answer
56
views
Do Bitcoin actually exist on the bitcoin network?
Where can I find the bitcoin on the blockchain? Do they exist? Are they physically being moved when transferred? How can I custody them in cold storage if they are on a public blockchain?
- 145
1
vote
1
answer
39
views
Blockchain API not sending subscribed info
I'm having trouble receiving WebSocket messages for address-related events. Here is the code that I'm using (trackAddress gets called externally and I'm sure it sends the right thing). I also tried ...
- 11
0
votes
2
answers
62
views
How can I track my bitcoins to the blockchain?
I'm sorry if this is a stupid question; I'm just trying to learn more about Bitcoin and the blockchain. How would I identify the bitcoins that are mine within the blockchain? I can use Trezor to ...
- 1
1
vote
3
answers
69
views
How does hash work in a block for many transactions?
I know that a block in a chain has prev.hash and hash. The prev.hash is the previous block's hash. The hash is the current block's hash which is calculated based on nonce.
One block can also have up ...
- 113
0
votes
1
answer
294
views
How to differentiate between BTC transactions and BRC20 transactions on a blockchain?
How to differentiate between BTC transactions and BRC20 transactions on a blockchain using the RCP interface?
This is a transaction record that contains BRC20 tokens which I found on a blockchain ...
- 3
1
vote
1
answer
91
views
Technically speaking, how are transactions recovered with a private key?
I have tried searching for this answer but I must not know the right keywords or something because I can't find an explanation anywhere.
There are 2^96 addresses per private key and ~865,000,000 ...
- 111
0
votes
2
answers
63
views
How does a node know if there are two conflicting blockchains?
I am curious to know how a node first knows if there are conflicting blockchains, I'm assuming, when two miners send a node a valid block, the node accepts the one it received first, and restores the ...
0
votes
1
answer
61
views
A few of my addresses that have funds show empty through my node
I have recently connected sparrow wallet to my own node to get away from using a private electrum server.
But some of the addresses I have bitcoin in are not being recognized. I know they have funds ...
- 9
-1
votes
1
answer
81
views
How do brc20 wallets query the chain?
I'm having a look over OrdPay Wallet which is an extension wallet for interacting with ordinals on the bitcoin network. How can sites like these query the bitcoin ordinal chain and see that I have an ...
-3
votes
1
answer
51
views
When will the Blockchain catch up? [closed]
Satoshi. Stated something about when cpu processing power becomes more the transactions will show zero until the system catches up. Is there any way to know when this will be?
- 1
0
votes
1
answer
73
views
Is It normal for a transaction fee to be 235% higher than the amount being sent?
I had 2 transactions for the same amount of 0.0021 btc sent out to two different btc addresses and the transaction fees were 0.0048 btc for each of the transactions. Is this normal? Is there any way ...
1
vote
3
answers
100
views
Is it possible to create a token on the Bitcoin blockchain?
If so, would this token adhere to the same principles as Bitcoin, such as halving events and mining techniques?
- 11
1
vote
1
answer
45
views
Does checking for block validity involve checking for the validity of the whole blockchain?
In Ethereum Whitepaper there is a following description of Bitcoin's check for block validity:
The algorithm for checking if a block is valid, expressed in this paradigm, is as follows:
Check if the ...
- 33
0
votes
0
answers
19
views
setting personal blockchain Server/Node to store website reviews
Hello & Good Day,
I wanted to setup a bitcoin based web application to store website reviews [my personal project not for mining coins or providing bitcoin distributed node]. I just wanted to ...
- 101
0
votes
0
answers
154
views
Generate a Bitcoin taproot address with specific prefix for burning assets
I would like to generate a bitcoin taproot address (bc1p) for burning assets. Which means not one would have the private key. But in the mean time I would also want a vanity address (an address start ...
- 31
2
votes
1
answer
43
views
Why emitter and receptor see different information about the same transaction in Electrum?
I have made a transfer from one Electrum wallet to another one. When I inspect this transaction from the emitter wallet and from the receiver wallet, I see different that. In particular, the input ...
- 171
1
vote
0
answers
42
views
How can I collate blocks in blk*.dat files and rev*.dat files?
According to this answer, blocks in blk*.dat files and rev*.dat files don't necessarily appear in the same order, nor are either files necessarily in monotonic order, and blocks not part of the active ...
- 6,648
1
vote
1
answer
120
views
Delay time for the second block of Bitcoin blockchain
According to the data stored in the blockchain, the genesis block is mined at Jan 03, 2009. The second block is mined at Jan 09, 2009, 6:24:25 AM. Which is 6 days later. At first, it seems rational to ...
- 1,225
3
votes
2
answers
96
views
Why is not good having forks in a blockchain?
To be more specific, if I imagine to work with isolated transactions chained to each other according to money flow, then I understand that we wish to have a single chain because forks would mean the ...
- 31
5
votes
1
answer
122
views
Can I replace a single corrupted block?
I'm running Bitcoin Core on Linux and it seems I have a single corrupted block file which is causing problems. It's taken me 2 weeks to download 75% of the blockchain, so I'd like to replace the ...
- 51
0
votes
0
answers
34
views
How to display {block number} instead {date value} on Wordpress posts?
Ideally, the goal is to show the block number (ie: 782667) instead of the date value (ie: 26 March 2023 4:44PM CT) on all wordpress posts and pages that currently display it.
There's maybe a script we ...
- 121
0
votes
2
answers
53
views
Deleting data in blockchain
I have read that block in blockchain is immutable since the next block is storing the hash of previous block .
What if , to remove a block from the blockchain , I set the "previous hash" of ...
- 1
-1
votes
1
answer
256
views
My multibit core synchronization is stuck Whats the reason [duplicate]
For the past six days since I downloaded the multibit core, I wanted to recover my wallet I still have my recovery phrase and password, and open the multibit core and the wallet was synchronization ...
3
votes
1
answer
251
views
Cannot Access My Crypto Wallet ( It’s Not the Seed Phrase), maybe derivation path?
Requirement: Recover crypto
What I possess: I have a 12 word seed phrase, (Though I am not exactly sure of the organization that generated it).
I have the public address through which (blockchain.com ...
- 31
4
votes
1
answer
146
views
Size of the `chainstate/` dir vary from node to node
I run 2 nodes:
a non-pruned, txindex=1 node that has been running for years (I can't tell exactly but I think I have been moving the same datadir around since 2014/15), core v23.0.0
a pruned node ...
- 623
-2
votes
1
answer
99
views
How did Satoshi Nakamoto create the first Bitcoin? The Genesis Block
How did Satoshi Nakamoto create the first Bitcoin? I have never read any statement where he recommends specific tools like CGMiner. You can't mine with the Bitcoin Core software. Actually, Bitcoin ...
user140388
-2
votes
1
answer
2k
views
I was recently contacted by blockchain, saying I have money in wallet,account is frozen ,and can recover money. Is this legit? Can't remember wallet [closed]
I was recently contacted by blockchain Acces UK claiming that I had created a bitcoin wallet years ago. Was informed wallet has 4.2 BTC coins in it which is equivalent to almost $40,000. The account ...
- 1
5
votes
1
answer
493
views
Can I delete blk*.dat files?
Since bitcoin validates blockchain by the hash of older blocks recursively; Can I just keep the last blk*.dat file and delete the rest while the bitcoin core is downloading and validating the ...
- 65
0
votes
0
answers
87
views
Why do many of the early bitcoin addresses receive small transactions many years later? [duplicate]
For example...
https://www.blockchain.com/explorer/addresses/btc/1NHHWnZKTetjZZfAbVjTS9EHQafdH6xn8a
...receives a block reward of 50 BTC in 2009 and then transactions in 2019, 2020, 2021 for tiny ...
- 275
1
vote
1
answer
86
views
Is it possible to add custom data on blockchains transaction such as a payment reference?
As we traditional bank it is possible to add a reference when sending money away.
Is it possible to put some short custom data when sending a blockchain transaction, such as payment reference ?
I'm ...
- 55
3
votes
2
answers
273
views
Downgrading Bitcoin Core 24.99 (latest source code) to 24.0.1
I wanted to build Bitcoin Core myself, so I followed this official guide, but in the process I failed to realize that by cloning the git repo I would just get the latest source code, not the latest ...
- 31
3
votes
2
answers
2k
views
Understanding how ordinals work with the Bitcoin blockchain. What is exactly stored on the blockchain?
Supposedly someone uploaded a Doom clone to the bitcoin blockchain:
https://ordinals.com/content/521f8eccffa4c41a3a7728dd012ea5a4a02feed81f41159231251ecf1e5c79dai0
But I'm a bit confused on exactly ...
- 11k
-3
votes
1
answer
2k
views
Is bitcoin bonus and cloud mining real? [duplicate]
I received an email saying I have so much money from a cloud mining app that I set up using my phone and the app connected with my IP address.. I didn't really pay to much attention to the app so I ...
- 1
12
votes
2
answers
832
views
Follow-up to Segwit: Arbitrary data storage in witness?
In 2017 a question about Segwit: Arbitrary data storage in witness? asked whether people wanting to store more data in the blockchain than OP_RETURN allows could instead store data in the witness ...
- 25.2k